Failed -remote 39-flashing Lock Flag Is Locked. Please Unlock It First 39-- Jun 2026
Open a terminal or command prompt in your Android Platform Tools folder. Run the command: adb reboot bootloader .
You must use the "Mi Unlock Tool" and wait for a specific cooling-off period (usually 168 hours) before the flag can be flipped. Open a terminal or command prompt in your
your device and erase all data. Confirm the action on the device screen using the volume buttons and power key. Android Open Source Project Step 4: Verify Unlock Status your device and erase all data
The error FAILED (remote: 'Flashing Lock Flag is locked. Please unlock it first!') occurs when you attempt to flash firmware or partitions to an Android device while the . On many modern devices, simply enabling "OEM Unlocking" in settings is not enough; you must also execute a specific hardware-level unlock command while in fastboot mode. Error Analysis Please unlock it first
This error occurs when you try to use to flash files onto an Android device (often Motorola or Lenovo) while the bootloader is still protected by a software lock. Essentially, the device's security prevents any unauthorized changes to its system partitions. Android Open Source Project 🛠️ How to Fix the Error To resolve this, you must follow these steps in order: 1. Enable "OEM Unlocking" in Android About Phone Build Number seven times to enable Developer Options Developer Options OEM Unlocking USB Debugging 2. Execute the Unlock Command Connect your phone to your computer via USB. Use the command adb reboot bootloader to enter Fastboot mode. Run one of these commands based on your device age: Newer devices: fastboot flashing unlock Older devices: fastboot oem unlock Android Open Source Project 3. Specific Case: Motorola/Lenovo Many Motorola devices require a unique Unlock Key Motorola Unlock Portal You will need to run fastboot oem get_unlock_data to get a string of characters to submit to their site. ⚠️ Important Warnings Data Loss: Unlocking the bootloader wipes all user data (factory reset). This process typically voids your warranty Your device becomes less secure against physical tampering. Android Open Source Project 💡 Troubleshooting Tips